Questions tagged [connections]
One or more connections to a database or database server. For questions about *establishing* a connection, use the **connectivity** tag instead.
235 questions
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How to fix mongosh v2.3.3 connection error with AWS DocumentDB v5.0.0
When I try to connect to documentdb cluster version 5.0.0 using mongosh version 2.3.3 it is returned the error message:
MongoServerError: Unsupported mechanism [ -301 ]
I am using the connection ...
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1
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62
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Environment variable $PGUSER does NOT take effect with Postgresql client?
For many years I have used to use the environment variable $PGUSER when I work with client tools such as psql/pg_dump/pg_restore.
Recently I build up a new PG13 server, the env var $PGUSER does NOT ...
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2
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87
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Error while connecting Local DB 2012 in Windows 7 PC using SSMS
I am trying to access LocalDB 2012 on my Windows 7 SP1 PC.
I have successfully installed LocalDB and started the instance using the command line, and it is currently running.
However, when I attempt ...
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Need help with ER diagram for my pet project
Right now, I have started to learn more about databases. One of the topics that I have more questions about is the relationships between tables. For example, I am currently trying to create an ER ...
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Track the connection history to a certain table in SQL Server
Is there a way to keep the connection history to a certain table in SQL-server?
Not just the database because that's easy using the DMV's but just one particular table.
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MSSQL multi user database with Trusted Connections and AD auth - Connection Timeouts [closed]
at our company we run a MS SQL Server that hosts around 70 databases for various software products that are used by our colleagues.
The server is version 2016, 8 cores, 127 GB Ram, lots of disk space. ...
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3
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152
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Why does killing a SQL Connection allow a reconnect with SSMS
I would like to kill connections for individuals using certain sql auth logins in SSMS that are reserved for our apps. They should have to go out of their way to reauthenticate into sql and at least ...
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Is there a way to prove whether a connection used the MultiSubnetFailover argument? [duplicate]
I know that consulting sys.dm_exec_connections can show whether a connection is using an AOAG listener or was made directly to the instance. And I know that if a connection is successful that it was ...
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234
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Aurora RDS - difference between ConnectionAttempts and DatabaseConnections
So I have read this a few times about these two metrics: ConnectionAttempts and DatabaseConnections.
Based on the above, is RDS rejecting lots of connections? Here are the graphs of these two metrics.
...
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What could be a reason for MySQL stop receiving new connections?
I'm running a production MySQL on linux whose max connection is configured to 7000. Among 7000, approximately 3500 connections were used by application, serving user requests.
A malicious user tried ...
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129
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Hanging Sessions in SQL server with NULL values Blocking other processes
My customer has noticed that there are connections that are opened but they never closed and as a result, API requests are getting timed out since they are getting blocked by a "Ghost" ...
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327
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macos ventura postgres 15 remote connections server closed the connection unexpectedly
macos ventura 13.5.1 postgresql (15.4 (Homebrew))
Remote connections for the server are closed "unexpectedly". I have done all the steps that are needed for postgres to be happy with remote ...
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1k
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Should I re-use a database connection or create new collections while closing old ones? social media
this is for a social media with constant requests for new posts, checking is someone is following, getting comments, ect.
i wont specify which language as it doesnt really matter but, currently in my ...
2
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2
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803
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Does having a specific database for each user in a web app good design?
I have a client who's insisting in a SaaS application to have one table for all users, and then for each user to have a separate database on which we perform CRUD operations based on an authentication ...
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3k
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run mariadb (mysql) on multiple cpu core
How can I make MariaDB on Debian 11 use all cores equally?
Currently, my configuration is using version 10.5.18-MariaDB-0+deb11u1-log on a server with
12th Gen Intel(R) Core(TM) i9-12900K 24 core CPU
...
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Unknown, Un-encryted Connections [duplicate]
We have SSL enabled on our SQL servers and our monitoring tool is alerting that there are unencrypted connections.
The check that monitors this runs every minute and uses the following query to check:
...
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150
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Persistent problems connecting MySQL Workbench to an AWS RDS DB
I started off my attempt to figure out how to connect my local MySQL Workbench (8.0.32) client/application to an RDS Database on my analytics team's AWS Account by asking Bing AI and this is what it ...
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Using two transactions at the same time without getting Lock wait timeout exceeded
I use MySQL 5.6
I'm trying to make a test framework on PHPunit, I use two different db connections (from two different systems it has to be 2 different db connections not a choice). By default many ...
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How much resources does a sleeping connection require in SQL Server?
One of our DBAs complained to our team that he noticed about a dozen sleeping connections are virtually permanent. Each of them indicates a very short query (a single record from a single record was ...
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574
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mongodb connections current vs active
When I use the command 'db.serverStatus().connections' I don't understand the meaning of 'current'. The documentation defines it as 'The number of incoming connections'. Doc
My application is a chat, ...
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130
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What is the endpoint for an Azure SQL database for using in a REST get request?
I am new to Azure SQL database and was hoping that I would get some help on how to address the database as an endpoint in a http request I am doing from an apex callout in Salesforce.
Normally in ...
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postgres 11: remaining connection slots are reserved for non-replication superuser connections
I've run into the following problem. From time to time, my app receives remaining connection slots are reserved for non-replication superuser connections from postgres. It lasts for quite noticeable ...
- 625
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462
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Find which IP added a specific record to a table in SQL Server
Let's say I have an SQL Server running on Azure and multiple applications add records to it.
The problem is that some records come from an unknown application.
Is there a nice way of finding which IP ...
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198
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Mariadb equivalent to MySQL CONNECTION_CONTROL
MySQL introduced a security plugin library in version 5.7.17 including the plugin CONNECTION_CONTROL, which checks incoming connection attempts and adds a delay to server responses as a result of ...
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723
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How can I keep the connecton to the database alive in pgAdmin 4?
I am constantly seeing this message:
ERROR: server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
server closed ...
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2
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91
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How can I create a brand new alarm based on a verification not listed by default on SQL Server?
I want to create an alert like the ones from Brent Ozar's How to Configure SQL Server Agent Alerts, but I couldn't find a message related to the error I want to monitor on sys.messages as the ...
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SET SINGLE_USER WITH ROLLBACK IMMEDIATE only disconnects sessions when account is a database user
The following code creates a user that is able to restore a database:
CREATE LOGIN RestoreUser WITH PASSWORD = 'MyPassword'
ALTER SERVER ROLE dbcreator ADD MEMBER RestoreUser
This works fine and the ...
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3
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Can connect to virtual MySql instance using 127.0.0.1, but not localhost
Running MySql 5.7.33 on a local VirtualBox instance. I have forwarded port 3306 from the virtual server to be accessible locally. On my virtual host, I have this in my /etc/mysql/my.cnf file ...
[...
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Change max_connections Postgresql
how i can change max_connections on Postgresql.conf without restart service Postgresql?
Systemctl reload postgresql.service not work with this conf.
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192
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Datagrip connecting to databases on launch
I'm using Jetbrains Datagrip to connect to Mysql servers. My problem is that Datagrip connects to the various databases I created as soon as I launch it. That's not a problem with development ...
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PostgreSQL 12 dropped replication slot but standby is still trying to contact the primary
We have recently decommissioned a standby that was experiencing some hardware issues from our streaming replication cluster. We were able to successfully stop the PID on the primary and then drop the ...
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Azure Data studio - connection to server in the same network - Error: The received certificate has expired
I am trying to connect to SQL server on my network with Azure Data Studio, and I am getting error:
A connection was successfully established with the server, but then an error occurred during the ...
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How to forcefully drop all active connections off a database?
On one server I have a Postgresql database and there're many clients on other servers accross the internet that connect to it. I want to drop all the active connections on demand, they should be ...
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PostgreSQL: Using the .pgpass file
I have been reading up on the .pgpass file, but I can’t get it working for me.
My .pgpass file looks something like this:
127.0.0.1:5432:accounts:fred:p@55w0rd
I set the privilege to 0600 (this is on ...
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Test connection failed because of an error in initializing provider. DBNETLIB ConnectionOpen SecDoClientHandshake SSL security error
I'm running all Windows 2016 Servers. I've got MS SQL 2016 installed on one. For whatever reason, we cannot connect to the SQL Server unless we enable TLS 1.0 which is obviously not cool.
I found ...
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847
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When a thread/process crashes on acquired DB locks, how does DB detects that and releases the lock?
Take MySQL as an example, say a thread run SELECT ... FOR UPDATE crashes before committing the update, how does MySQL detect the crash and release the lock?
I assume most RMDBS will have some keep-...
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471
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postgresql, connection limit for different roles
Is possible setup in postgresql.conf connection limit for specified role globally (in some .conf file) or individually?
For example, I have 3 roles and max_connections = 600.
Need to setup max 10 ...
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ODBC Calling Fill - Unexpected closed connection after 2 hours
Using PostgreSQL 12.3 (Ubuntu 12.3-1.pgdg18.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0, 64-bit
I use driver PostgresSQL Unicode(x64) version 13.00.00.00
I have ...
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many "unauthenticated user" on MySQL Processlist
In show processlist I have (from time to time) lot of unauthenticated user.
How it looks like?
| 187743 | unauthenticated user | connecting host | NULL | Connect | 39173 | ...
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Identifying processes that open MySQL connections
I need to identify which application process issues a large number of MySQL connections on a Linux system.
The show processlist sql command or tools like innotop do not really help, as they only show ...
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Nested Stored Procedure Connections
I have a Stored procedure that simply looks for Imported files through a set of other processes. The main SP runs every 5 mins and looks for new files in a directory and imports them into a staging ...
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654
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Why is MySQL not connecting when reading from mylogin.cnf?
On Ubuntu 20.04, I can log into a server by specifying the log credentials on the CLI:
$ mysql -h172.30.0.2 -uroot -p bar -e "SELECT id FROM users LIMIT 1;"
Enter password:
+----+
| id |
+---...
- 1,095
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MultiSubnetFailover=true for DBMSes besides SQL Server
A connection string for SQL Server can contain MultiSubnetFailover=true, to handle multiple DNS A records, letting the client try to connect to every IP address of a domain (or subdomain) name, to ...
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Unknown source of high number of connections
In MySQL/Aurora I see from time to time a spike in connections number (from about 100 to 4000):
MySQL doc says:
Connections
The number of connection attempts (successful or not) to the MySQL server.
...
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44
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SQL Server Identifying Connections that are utilising SQL from an application
Is it possible to identify connections in SQL Server 2014 that are utilising SQL that is passed from an application as opposed to calling an SP ?
- 1,399
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Warning message: invalid value for parameter "default_tablespace" in postgres
I create a new tablespace using the following script:
CREATE SCHEMA semiarido;
CREATE ROLE semiarido PASSWORD 'senha';
GRANT CREATE ON SCHEMA semiarido TO semiarido;
GRANT USAGE ON SCHEMA semiarido ...
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2020-07-29T07:44:29.817503Z 108716 [Note] Aborted connection 108716 to db:
We are getting continuously logs in mysql error logs
2020-07-29T07:46:56.534666Z 111536 [Note] Aborted connection 111536 to db: '' user: '' host: '' (Got an error reading communication packets)
we ...
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356
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How Are SQL Server Clients Connecting?
I am asking two questions in this post. If I see activity in netstat with port 1433 for an unnamed instance, whose tcp addresses are not enabled, what does that mean?
What is the preferred way to ...
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Why would I download CA certificate when starting a managed Postgres cluster on DigitalOcean?
I am trying for the first time a Postgres cluster provided as a managed service by DigitalOcean.com.
As part of configuring the new cluster, their web interface gives me a user name, password, port ...
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Why do I have 2 connections when im using 1 client?
The command:
select * from pg_stat_activity
shows all currently active connections.
The database is hosted by AWS RDS and I am accessing the database with pgAdmin 4, thus I expect one other ...
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